923
NTAK79 2.0 Mb PRI card
Contents This section contains information on the following topics:
"Introduction" (page 923)
"Physical description" (page 924)
"Functional description" (page 932)
"Architecture" (page 933)
IntroductionThe NTAK79 2.0 Mb Primary Rate Interface (PRI) card provides a 2.0 Mb
interface and an onboard D-channel handler (DCH). The NTAK79 card
also includes an onboard clock controller (equivalent to the NTAK20 Clock
Controller) that can be manually switchedinto or out of ser vice.
The NTAK79card does not suppor t the NTBK51 downloadable D-channel
handler daughterboard.
Youcan install this card in slots 1 through 4 in the Media Gateway. The card
is not supported in the Media Gateway Expansion.
Note: Up to three four trunk cards are supported in each Media
Gateway.
ATTENTION
IMPORTANT!
Each Media Gatewaythat has a digital trunk must havea clock controller clocked
to an external reference clock.
Note: Clocking slips can occur between systems that are clocked from
different Central Offices (COs), if the COs are not synchronized. The
slips can degrade voice quality.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.